/*
 * RED5 Open Source Flash Server - http://code.google.com/p/red5/
 * 
 * Copyright 2006-2013 by respective authors (see below). All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.red5.io.flv;

import java.io.Serializable;
import java.util.Arrays;

/**
 * Analyzes key frame data.
 */
public interface IKeyFrameDataAnalyzer {

	/**
	 * Analyze and return keyframe metadata.
	 *
	 * @return           Metadata object
	 */
	public KeyFrameMeta analyzeKeyFrames();

	/**
	 * Keyframe metadata.
	 */
	public static class KeyFrameMeta implements Serializable {
		
		private static final long serialVersionUID = 5436632873705625365L;

		/**
		 * Video codec id.
		 */
		public int videoCodecId = -1;

		/**
		 * Audio codec id.
		 */
		public int audioCodecId = -1;

		/**
		 * Duration in milliseconds
		 */
		public long duration;

		/**
		 * Only audio frames?
		 */
		public boolean audioOnly;

		/**
		 * Keyframe timestamps
		 */
		public int timestamps[];

		/**
		 * Keyframe positions
		 */
		public long positions[];

		/* (non-Javadoc)
		 * @see java.lang.Object#toString()
		 */
		@Override
		public String toString() {
			return "KeyFrameMeta [videoCodecId=" + videoCodecId + ", audioCodecId=" + audioCodecId + ", duration=" + duration + ", audioOnly=" + audioOnly + ", timestamps="
					+ Arrays.toString(timestamps) + ", positions=" + Arrays.toString(positions) + "]";
		}
	}
}
